package com.example.demo.handle;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        HttpSession session = httpServletRequest.getSession();
        String url = httpServletRequest.getRequestURI();
        if (url.indexOf("/index")>=0){
            return true;
        }else if (url.indexOf("/login")>=0){
            return true;
        }else {
            String user = (String) session.getAttribute("user");
            if(user!=null){
                return true;
            }else{
                httpServletResponse.sendRedirect("/index/");
                return false;
            }
        }
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}
